A number of incidents of attack on civilian and UN convoys have been reported. The Israel Defense Forces has disputed involvement in some cases, and has also alleged that no prior coordination took place before some affected convoys set out. These allegations have in turn been disputed. There have also been reports that fear of aerial attack has prevented drivers from transporting humanitarian aid within Lebanon. One estimate two weeks into the conflict placed the number of Lebanese truck drivers who had died as a result of IDF/IAF air strikes on convoys as "dozens".